.head {
    width: 100%;
    /*position: fixed;*/
    top: 0;
}

.bottom {
    color: #FFFFFF;
    width: 100%;
    height: 55px;
    margin: 0 auto;
    padding: 20px 0 20px 0;
    background: #333333;
    position: fixed;
    bottom: 0;
}